-44-
Model W1740 (For Machines Mfg. Since 1/13)
SE
RV
IC
E
PROBLEM
POSSIBLE.CAUSE
CORRECTIVE.ACTION
Machine stalls or is under-
powered.
1. Motor has overheated.
2. Machine is undersized for the task.
3. Belt is slipping.
4. Low power supply voltage.
5. Pulley or sprocket is slipping on
shaft.
6. Motor connection is wired incor-
rectly.
7. Centrifugal switch is at fault.
8. Motor bearings are at fault.
9. Motor is at fault.
1. Unobstructed motor cooling air flow, let motor cool,
and reduce workload on machine.
2. Use new sandpaper with appropriate grit, and
reduce the feed rate/depth of sanding.
3. Replace bad belt, align pulleys, and re-tension.
4. Make sure all hot lines and grounds are operational
and have correct voltage on all legs.
5. Replace loose pulley and shaft.
6. Correct motor wiring (see Page
48
).
7. Adjust or replace the centrifugal switch.
8. Rotate motor shaft for noisy or burnt bearings,
repair/replace as required.
9. Test, repair or replace motor.
Machine lacks power;
drum stops turning under
load.
1. V-belt loose.
2. Too much pressure on pressure
rollers.
1. Tighten V-belt (
Page.25
).
2. Reduce pressure roller pressure (
Page.33
).
Machine slows when sand-
ing, making a squealing
noise, especially on start-
up.
1. V-belt loose.
2. V-belt worn out.
1. Tighten V-belt (
Page.25
).
2. Replace V-belt (
Page.25
).
Vibration when sanding.
1. Loose drum pillow block bearings.
2. Worn drum pillow block bearings.
1. Tighten drum pillow block bearings.
2. Replace drum pillow block bearings.
Grinding, screeching, or
rubbing noise when sand-
ing drum is powered up.
1. Drum bearings lack sufficient
grease.
2. Drum bearings are worn and need
replacement.
1. Grease pillow block bearings (
Page.24
).
2. Replace the drum bearings.
Sanding.Operations
